US5133824A - Method and device for removing a flexible product from a carrier plate - Google Patents

Method and device for removing a flexible product from a carrier plate Download PDF

Info

Publication number
US5133824A
US5133824A US07/626,584 US62658490A US5133824A US 5133824 A US5133824 A US 5133824A US 62658490 A US62658490 A US 62658490A US 5133824 A US5133824 A US 5133824A
Authority
US
United States
Prior art keywords
article
plate
central zone
towards
center
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US07/626,584
Inventor
Petrus A. A. Huberts
Henricus H. B. Wouters
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Philips and Du Pont Optical Co BV
Original Assignee
Philips and Du Pont Optical Co BV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Philips and Du Pont Optical Co BV filed Critical Philips and Du Pont Optical Co BV
Assigned to PHILIPS AND DU PONT OPTICAL COMPANY, reassignment PHILIPS AND DU PONT OPTICAL COMPANY, ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: HUBERTS, PETRUS A.A., WOUTERS, HENRICUS H.B.
Application granted granted Critical
Publication of US5133824A publication Critical patent/US5133824A/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B33/00—Constructional parts, details or accessories not provided for in the other groups of this subclass
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/26—Apparatus or processes specially adapted for the manufacture of record carriers
    • G11B7/263—Preparing and using a stamper, e.g. pressing or injection molding substrates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D17/00—Producing carriers of records containing fine grooves or impressions, e.g. disc records for needle playback, cylinder records; Producing record discs from master stencils
    • B29D17/005—Producing optically read record carriers, e.g. optical discs
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
    • G11B23/0057—Intermediate mediums, i.e. mediums provided with an information structure not specific to the method of reproducing or duplication such as matrixes for mechanical pressing of an information structure ; record carriers having a relief information structure provided with or included in layers not specific for a single reproducing method; apparatus or processes specially adapted for their manufacture
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B3/00—Recording by mechanical cutting, deforming or pressing, e.g. of grooves or pits; Reproducing by mechanical sensing; Record carriers therefor
    • G11B3/68—Record carriers
    • G11B3/685—Intermediate mediums
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/11—Methods of delaminating, per se; i.e., separating at bonding face
    • Y10T156/1126—Using direct fluid current against work during delaminating
    • Y10T156/1132—Using vacuum directly against work during delaminating
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/19—Delaminating means
    • Y10T156/1928—Differential fluid pressure delaminating means
    • Y10T156/1944—Vacuum delaminating means [e.g., vacuum chamber, etc.]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T279/00—Chucks or sockets
    • Y10T279/11—Vacuum

Definitions

  • the invention relates to a method for removing a flexible article or product, in particular an information-carrying disc-type element from a carrier plate, in particular a mold, by creating a partial vacuum at the side of the product facing away from the carrier plate.
  • a thin layer of material for example a nickel layer approximately 0.3 mm thick, is generally deposited on and is thus in intimate contact with the master mold or the mother mold.
  • the mother or stamper mold approximately 0.3 mm thick thus obtained is a flexible disc-type element which for further use must be removed from the master or mother mold forming a carrier plate. It is, of course, of great importance here that any damage to the molds is avoided, since damage to the molds will adversely affect the quality of the end product.
  • the object of the invention is therefore to obtain a method for the removal of a article or product from a carrier plate in which the causing of damage will be practically ruled out.
  • the product to be removed from the carrier plate can remain clamped on the carrier plate near its center and can be peeled or bent off gradually from the carrier plate from its ends inwards, avoiding the occurrence of a relative shift between the product of the carrier plate in a direction parallel to the initial contact face between the product and the carrier plate, so that the occurrence of damage is practically ruled out.
  • an efficient device for carrying out the method according to the invention can be obtained if the device is provided with a base on which a carrier plate can be placed and clamped by creating partial vacuum between the carrier plate and the base, and the device is also provided with a removal plate which can be positioned above the carrier plate, and of which the boundary face or surface facing the carrier plate is cylindrically curved at least over the greater part of its surface, with a center of curvature which is situated at the side of the removal plate facing away from the carrier plate, so that the boundary surface is convex.
  • the device also means for the creation of a partial vacuum near the boundary face which is curved.
  • the carrier plate with the flexible product thereon can be positioned between the base and the removal plate and, through the creation of a partial vacuum, the flexible product can be attracted towards the boundary face of the removal plate, for the removal of the flexible product from the carrier plate.
  • FIG. 1 shows schematically a cross-section through a master or mother mold with mother or stamper mold formed thereon.
  • FIG. 2 shows schematically a cross-section through the two molds shown in FIG. 1, clamped between a base and a removal plate.
  • FIG. 3 shows a cross-section corresponding to that of FIG. 2, in which an edge of the mother or stamper mold extending round the master or mother mold is removed.
  • FIG. 4 shows schematically a cross-section through the removal plate.
  • FIG. 5 shows a part of an example of an embodiment of the device according to the invention, partially in cross-section, partially an elevational view.
  • FIG. 1 shows a disc-type master mold or mother mold 1 in cross-section, having a generally planar surface.
  • a mother mold or stamper mold 2 is produced on this mold by depositing thereon, for example, a nickel layer approximately 0.3 mm thick. As can be seen from FIG. 1, during the production of the mold 2, this nickel material is also deposited around the edge of the master mold or mother mold 1, forming a projecting bead 3.
  • the two molds 1 and 2 are clamped in the manner shown in FIG. 2 between a base 4 and a removal plate 5.
  • This assembly of base 4 and removal plate 5 with the molds between them is then set in rotation, and the beaded edge 3 is removed by means of a chisel or file, so that the construction shown in FIG. 3 is then obtained.
  • a partial vacuum is then created between the planar top face of the mold 2 (shown in the figures) and the boundary face 6 of the removal plate 5 facing the mold 2.
  • the boundary face 6 is made curved, and is in fact curved about a line extending at right angles to the plane of the drawing, so that the boundary face 6 forms part of a cylindrical curved surface, of which the center of curvature is situated at the side of the boundary face 6 facing away from the base 4. It is pointed out that, for the sake of clarity, the curvature of the boundary face of the removal plate 5 is shown greatly exaggerated in FIGS. 2-4.
  • the greatest height distance (a) between the center of the boundary face 6 and a point situated on its periphery is approximately 0.5 mm.
  • the boundary face is preferably also provided with a flat, non-curved center part 8, which in the position shown in FIGS. 2 and 3 extends parallel to the flat top boundary face of the base 4, has a diameter (d) of approximately 10 mm and, as shown in the figures, projects approximately 50 microns below the adjacent part of the boundary face 6.
  • the mold 2 By means of the centrally situated center part 8, the mold 2 will be held pressed against the mold 1, while through the creation of a partial vacuum between the top face of the mold 2 and the boundary face 6 of the removal plate 5 the flexible mold 2 will be attracted, while bending in a direction away from the mold 1, towards the curved boundary face 6.
  • the removal plate 5 with the mold 2 clamped thereon can be moved upwards for complete separation of the two molds 1 and 2.
  • the center part of the mold generally is not provided with information, it is possible without the risk of damage to use the flat center part 8, by means of which a good hold on the molds 1 and 2 relative to each other can then be ensured during the bending of the mold 2 in a direction away from the mold 1.
  • FIG. 5 An expedient embodiment of a device by means of which the method described above with reference to FIGS. 1-4 can be carried out is shown in FIG. 5.
  • the device shown in FIG. 5 is provided with a table top 10, supported by a frame 9 which is only partially shown.
  • a vertical-standing shaft 14 is fixed by means of a key 15 in a hub-shaped element 13 which is mounted in the gearbox 11 and can be set in rotation, and which forms part of a gear wheel (not shown).
  • the shaft 14 is provided with a bore 16 extending in the lengthwise direction of the shaft 14.
  • a coupling element 17, which connects the bore 16 to a pipe 18 connected to the coupling element, is connected to the bottom end of the shaft 14, while the shaft 14 can be rotated relative to the coupling element 17 which has a fixed position in the device.
  • the base 4 is fixed by means of bolts 19 at the top end of the shaft 14. Near its periphery, the base is provided at its top side with an annular groove in which a sealing ring 20 with a lip 21 extending upwards and outwards is disposed.
  • grooves 22 which via bores 23 provided in the base are connected to a hole 24 provided centrally in the base, and to which the bore 16 provided in the shaft 14 is connected.
  • a cushion element (not shown) of resilient material, of the type described in EP-A-0, 298,564, is disposed on the top side of the base 4.
  • the removal plate 5 Placed above the base 4 is the removal plate 5 which at its periphery is also provided with an annular groove accommodating a sealing ring 25 which is provided with a sealing lip 26 running downwards and outwards.
  • the removal plate 5 contains a radially extending blind bore 27 which is shut off by a plug 28 at one end.
  • the bore 27 is connected by means of a number of bores 29 extending at right angles to the bore to grooves 30 provided in the bottom surface of the removal plate.
  • the removal plate is also provided at its bottom side with a cushion element (not shown) of the type described in EP-0, 298, 564.
  • the removal plate is suspended by means of a number of bolts 31 from a supporting plate 32 extending above the removal plate.
  • the bolts 31 in this case rest with their heads on the top side of the supporting plate 32, while the bolts are screwed into threaded holes in the removal plate.
  • the bolts 31 are surrounded by bushings 33 which are slidable in the vertical direction in the supporting plate 32, and which extend between the top side of the removal plate 5 and the bottom side of the heads of the bolts.
  • the bushings 33 are surrounded by compression springs 34, which lie confined between the top side of the removal plate 5 and collars 35 formed in the supporting plate 32 at the level of the transition between two parts, of different diameters, of bores provided in the plate 32 through which the bolts 31 extend.
  • the supporting plate 32 is fixed by means of bolts 36 to a hub-shaped element 37 placed on top of the supporting plate.
  • the hub-shaped element 37 is rotatably mounted by means of bearings 38 on a vertical-running shaft 39.
  • the shaft 39 is connected to a housing 40 which is fixed to an arm 41 extending on either side of the housing 40.
  • the arm 41 is swivellably fixed by means of a horizontal-running shaft 42 to a support 43 fixed on the table top 10.
  • the arm 41 In the position shown in FIG. 5 the arm 41 extends at least almost horizontally, while the ends of the arm 41 facing away from the support 43 rest on a support 44 also fixed to the table 10. This end of the support is in this case fixed by means of an eccentric disc 45, which in the position shown in FIG. 5 extends partially into a notch 46 provided in the support 44.
  • the eccentric disc 45 is rotatable from the position shown in FIG. 5 into a position in which the eccentric disc 45 no longer engages with the notch 46, by means of an operating handle 47 fixed on the eccentric disc 45.
  • a bore 48 extending in the lengthwise direction of the shaft 39, is provided in the shaft 39, said bore being closed off at its top end by a plug 49 screwed into the housing 40.
  • the open bottom end of the bore 48 opens out into a blind hole 50 which is provided in the supporting plate 32, and in which the bottom end of the shaft 39 is accommodated.
  • a circular groove containing a sealing packing 51 is fitted in this bottom end of the shaft 39.
  • a radially running bore 52 fitted in the supporting plate 32 extends from the outer periphery of the supporting plate 32 into the bore 50.
  • the end of the bore 52 lying near the outer periphery of the plate 32 is shut off by means of a plug 53 screwed into the supporting plate.
  • the plate 32 also has provided in it a threaded bore 54 extending at right angles to the bore 52, and to which flexible pipe 56 is connected by means of a connecting nipple 55.
  • the pipe 56 extends through a hole 57 provided in the plate 32.
  • the end of the pipe 56 lying in the hole 57 is here fixed by means of a nipple 58 in a threaded hole 59 which is provided in the plate 5 and is in open communication with the bore 27 disposed in the plate 5. It will be clear that in this way the two bores 27 and 52 are brought into open communication with each other by means of the pipe 56.
  • the housing 40 also contains a threaded bore 60 which extends at right angles to the bore 48 and is connected to said bore, and to which a pipe 62 is connected by means of a nipple 61.
  • the pipes 18 and 62 can be connected if desired to a vacuum source, so that a partial vacuum can be created both in the grooves 22 provided in the base 4 and in the grooves 30 provided in the removal plate 5.
  • a partial vacuum acting on the top side of the mold 2 for removing the mold 2 from the mold 1 can be created in a similar manner in the grooves 30 and the cushion element (not shown) fitted on the bottom side of the removal plate 5.
  • the arm 41 with the removal plate 5 carried by the grm 41 and the mold 2 adhering thereto can be swung clockwise about the shaft 42, as shown in FIG. 5, so that complete separation of the molds 1 and 2 is then achieved.
  • the mold 2 can then be removed from the removal plate and the mold 1 from the base plate.
  • a new assembly of molds 1 and 2 can then be placed on the base 4 and the arm 41 with the removal plate connected thereto can be swung back into the position shown in FIG. 5.
  • the removal plate 5 can swing out here in the vertical direction, so that good confinement of the two molds 1 and 2 between the base 4 and the removal plate will always be guaranteed.

Abstract

A flexible product, more particularly an information-carrying disc, is removed from a carrier plate, more particularly a mold, by creating a partial vacuum at the side of the product facing away from the carrier plate. While the product is being displaced in a direction facing away from the carrier plate under the influence of the partial vacuum, the product is guided in such a way that it is displaced over the greatest distance at two opposite ends and the displacement of the parts of the product situated between these ends decreases gradually towards the center of the product.

Description

BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to a method for removing a flexible article or product, in particular an information-carrying disc-type element from a carrier plate, in particular a mold, by creating a partial vacuum at the side of the product facing away from the carrier plate.
2. Description of the Related Art
For the production of data-carrying discs, use is commonly made of master molds, on which mother molds are made, while the mother molds are used again for the production of stamper molds, which can be used for the final production of the products.
For the production of a mother mold or stamper mold starting from a master mold or mother mold, a thin layer of material, for example a nickel layer approximately 0.3 mm thick, is generally deposited on and is thus in intimate contact with the master mold or the mother mold.
The mother or stamper mold approximately 0.3 mm thick thus obtained is a flexible disc-type element which for further use must be removed from the master or mother mold forming a carrier plate. It is, of course, of great importance here that any damage to the molds is avoided, since damage to the molds will adversely affect the quality of the end product.
SUMMARY OF THE INVENTION
The object of the invention is therefore to obtain a method for the removal of a article or product from a carrier plate in which the causing of damage will be practically ruled out.
This can be achieved according to the invention in that, while it is being displaced in a direction facing away from the substrate under the influence of the partial vacuum created, the product is guided in such a way that the product is displaced over the greatest distance at two opposite ends and the displacement of parts of the product situated between these ends in a direction away from the said ends decreases gradually towards the center of the product.
With the use of the method according to the invention, the product to be removed from the carrier plate can remain clamped on the carrier plate near its center and can be peeled or bent off gradually from the carrier plate from its ends inwards, avoiding the occurrence of a relative shift between the product of the carrier plate in a direction parallel to the initial contact face between the product and the carrier plate, so that the occurrence of damage is practically ruled out.
In this case, according to the invention, an efficient device for carrying out the method according to the invention can be obtained if the device is provided with a base on which a carrier plate can be placed and clamped by creating partial vacuum between the carrier plate and the base, and the device is also provided with a removal plate which can be positioned above the carrier plate, and of which the boundary face or surface facing the carrier plate is cylindrically curved at least over the greater part of its surface, with a center of curvature which is situated at the side of the removal plate facing away from the carrier plate, so that the boundary surface is convex. The device also means for the creation of a partial vacuum near the boundary face which is curved.
On use of the device according to the invention, the carrier plate with the flexible product thereon can be positioned between the base and the removal plate and, through the creation of a partial vacuum, the flexible product can be attracted towards the boundary face of the removal plate, for the removal of the flexible product from the carrier plate.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will be explained in greater detail below with reference to appended figures.
FIG. 1 shows schematically a cross-section through a master or mother mold with mother or stamper mold formed thereon.
FIG. 2 shows schematically a cross-section through the two molds shown in FIG. 1, clamped between a base and a removal plate.
FIG. 3 shows a cross-section corresponding to that of FIG. 2, in which an edge of the mother or stamper mold extending round the master or mother mold is removed.
FIG. 4 shows schematically a cross-section through the removal plate.
FIG. 5 shows a part of an example of an embodiment of the device according to the invention, partially in cross-section, partially an elevational view.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
FIG. 1 shows a disc-type master mold or mother mold 1 in cross-section, having a generally planar surface. A mother mold or stamper mold 2 is produced on this mold by depositing thereon, for example, a nickel layer approximately 0.3 mm thick. As can be seen from FIG. 1, during the production of the mold 2, this nickel material is also deposited around the edge of the master mold or mother mold 1, forming a projecting bead 3.
For the removal of the circular mold 2 from the also circular mold 1, the two molds 1 and 2 are clamped in the manner shown in FIG. 2 between a base 4 and a removal plate 5. This assembly of base 4 and removal plate 5 with the molds between them is then set in rotation, and the beaded edge 3 is removed by means of a chisel or file, so that the construction shown in FIG. 3 is then obtained.
For detaching the mold 2 from the mold 1, a partial vacuum is then created between the planar top face of the mold 2 (shown in the figures) and the boundary face 6 of the removal plate 5 facing the mold 2.
As can be seen from the figures, the boundary face 6 is made curved, and is in fact curved about a line extending at right angles to the plane of the drawing, so that the boundary face 6 forms part of a cylindrical curved surface, of which the center of curvature is situated at the side of the boundary face 6 facing away from the base 4. It is pointed out that, for the sake of clarity, the curvature of the boundary face of the removal plate 5 is shown greatly exaggerated in FIGS. 2-4.
With usual diameters of this boundary face 6 of the order of magnitude of 20-35 cm, the greatest height distance (a) between the center of the boundary face 6 and a point situated on its periphery is approximately 0.5 mm.
Near its center the boundary face is preferably also provided with a flat, non-curved center part 8, which in the position shown in FIGS. 2 and 3 extends parallel to the flat top boundary face of the base 4, has a diameter (d) of approximately 10 mm and, as shown in the figures, projects approximately 50 microns below the adjacent part of the boundary face 6.
By means of the centrally situated center part 8, the mold 2 will be held pressed against the mold 1, while through the creation of a partial vacuum between the top face of the mold 2 and the boundary face 6 of the removal plate 5 the flexible mold 2 will be attracted, while bending in a direction away from the mold 1, towards the curved boundary face 6. During such bending of the mold 2 about the axis of the boundary face 6 extending at right angles to the plane of the drawing, any shift between the two molds 1 and 2 in the boundary face between the two molds 1 and 2 lying on each other, which shift could cause damage to the mold surfaces, is practically ruled out.
After the mold 2 is bent in this way against the boundary face 6 of the removal plate and is clamped thereon through the partial vacuum created, the removal plate 5 with the mold 2 clamped thereon can be moved upwards for complete separation of the two molds 1 and 2.
Since the center part of the mold generally is not provided with information, it is possible without the risk of damage to use the flat center part 8, by means of which a good hold on the molds 1 and 2 relative to each other can then be ensured during the bending of the mold 2 in a direction away from the mold 1.
An expedient embodiment of a device by means of which the method described above with reference to FIGS. 1-4 can be carried out is shown in FIG. 5.
The device shown in FIG. 5 is provided with a table top 10, supported by a frame 9 which is only partially shown. A gearbox 11, which by means of a belt drive 12 can be driven by means of a motor (not shown), is fixed to the bottom side of said table top.
A vertical-standing shaft 14 is fixed by means of a key 15 in a hub-shaped element 13 which is mounted in the gearbox 11 and can be set in rotation, and which forms part of a gear wheel (not shown).
The shaft 14 is provided with a bore 16 extending in the lengthwise direction of the shaft 14. A coupling element 17, which connects the bore 16 to a pipe 18 connected to the coupling element, is connected to the bottom end of the shaft 14, while the shaft 14 can be rotated relative to the coupling element 17 which has a fixed position in the device.
The base 4 is fixed by means of bolts 19 at the top end of the shaft 14. Near its periphery, the base is provided at its top side with an annular groove in which a sealing ring 20 with a lip 21 extending upwards and outwards is disposed.
Provided in the top face of the base 4 are grooves 22 which via bores 23 provided in the base are connected to a hole 24 provided centrally in the base, and to which the bore 16 provided in the shaft 14 is connected.
A cushion element (not shown) of resilient material, of the type described in EP-A-0, 298,564, is disposed on the top side of the base 4.
Placed above the base 4 is the removal plate 5 which at its periphery is also provided with an annular groove accommodating a sealing ring 25 which is provided with a sealing lip 26 running downwards and outwards.
The removal plate 5 contains a radially extending blind bore 27 which is shut off by a plug 28 at one end. The bore 27 is connected by means of a number of bores 29 extending at right angles to the bore to grooves 30 provided in the bottom surface of the removal plate. The removal plate is also provided at its bottom side with a cushion element (not shown) of the type described in EP-0, 298, 564.
The removal plate is suspended by means of a number of bolts 31 from a supporting plate 32 extending above the removal plate. As can be seen from FIG. 5, the bolts 31 in this case rest with their heads on the top side of the supporting plate 32, while the bolts are screwed into threaded holes in the removal plate. The bolts 31 are surrounded by bushings 33 which are slidable in the vertical direction in the supporting plate 32, and which extend between the top side of the removal plate 5 and the bottom side of the heads of the bolts. The bushings 33 are surrounded by compression springs 34, which lie confined between the top side of the removal plate 5 and collars 35 formed in the supporting plate 32 at the level of the transition between two parts, of different diameters, of bores provided in the plate 32 through which the bolts 31 extend.
The supporting plate 32 is fixed by means of bolts 36 to a hub-shaped element 37 placed on top of the supporting plate. The hub-shaped element 37 is rotatably mounted by means of bearings 38 on a vertical-running shaft 39. The shaft 39 is connected to a housing 40 which is fixed to an arm 41 extending on either side of the housing 40.
The arm 41 is swivellably fixed by means of a horizontal-running shaft 42 to a support 43 fixed on the table top 10.
In the position shown in FIG. 5 the arm 41 extends at least almost horizontally, while the ends of the arm 41 facing away from the support 43 rest on a support 44 also fixed to the table 10. This end of the support is in this case fixed by means of an eccentric disc 45, which in the position shown in FIG. 5 extends partially into a notch 46 provided in the support 44. The eccentric disc 45 is rotatable from the position shown in FIG. 5 into a position in which the eccentric disc 45 no longer engages with the notch 46, by means of an operating handle 47 fixed on the eccentric disc 45.
A bore 48, extending in the lengthwise direction of the shaft 39, is provided in the shaft 39, said bore being closed off at its top end by a plug 49 screwed into the housing 40. The open bottom end of the bore 48 opens out into a blind hole 50 which is provided in the supporting plate 32, and in which the bottom end of the shaft 39 is accommodated. A circular groove containing a sealing packing 51 is fitted in this bottom end of the shaft 39.
A radially running bore 52 fitted in the supporting plate 32 extends from the outer periphery of the supporting plate 32 into the bore 50. The end of the bore 52 lying near the outer periphery of the plate 32 is shut off by means of a plug 53 screwed into the supporting plate.
The plate 32 also has provided in it a threaded bore 54 extending at right angles to the bore 52, and to which flexible pipe 56 is connected by means of a connecting nipple 55. The pipe 56 extends through a hole 57 provided in the plate 32. The end of the pipe 56 lying in the hole 57 is here fixed by means of a nipple 58 in a threaded hole 59 which is provided in the plate 5 and is in open communication with the bore 27 disposed in the plate 5. It will be clear that in this way the two bores 27 and 52 are brought into open communication with each other by means of the pipe 56.
The housing 40 also contains a threaded bore 60 which extends at right angles to the bore 48 and is connected to said bore, and to which a pipe 62 is connected by means of a nipple 61.
The pipes 18 and 62 can be connected if desired to a vacuum source, so that a partial vacuum can be created both in the grooves 22 provided in the base 4 and in the grooves 30 provided in the removal plate 5.
As is explained in EP-A-0,298,564, this partial vacuum will spread between the projecting parts of the cushion element made of deformable material which is placed on the top side of the base 4 or on the bottom side of the removal plate 5.
In the position of the device shown, two molds lying on each other, as shown in FIG. 1, are clamped between the base 4 and the removal plate 5, as explained above with reference to FIGS. 1-4. The lips 21 and 26 of the seals 20 and 25 in this case rest against the bottom side of the mold 1 and the top side of the mold 2 respectively, and the mold 1 can be clamped in an effective manner against the base 4 for the creation of a partial vacuum in the bore 16 in the shaft 14 and in the grooves 32 in the base 4 connected to this bore and the cushion element (not shown) placed thereon.
A partial vacuum acting on the top side of the mold 2 for removing the mold 2 from the mold 1 can be created in a similar manner in the grooves 30 and the cushion element (not shown) fitted on the bottom side of the removal plate 5.
After the mold 2 has been stuck to the bottom face of the removal plate 5 in this way, and after rotation of the eccentric disc 45 by means of lever 47 in such a way that this eccentric disc has become released from the notch 46, the arm 41 with the removal plate 5 carried by the grm 41 and the mold 2 adhering thereto can be swung clockwise about the shaft 42, as shown in FIG. 5, so that complete separation of the molds 1 and 2 is then achieved. On removal of the vacuum in the grooves 30, the mold 2 can then be removed from the removal plate and the mold 1 from the base plate. A new assembly of molds 1 and 2 can then be placed on the base 4 and the arm 41 with the removal plate connected thereto can be swung back into the position shown in FIG. 5.
Through the resilient support of the removal plate by means of the bolts 31 and the springs 34, the removal plate 5 can swing out here in the vertical direction, so that good confinement of the two molds 1 and 2 between the base 4 and the removal plate will always be guaranteed.
Although the main use of the method and the device according to the invention in the production of molds intended for the production of video and/or audio discs has been discussed above, it will be clear that the method according to the invention can also be used for the removal of other flexible products instead of molds 2 from carrier plates, which can be formed by objects other than the molds 1.

Claims (17)

We claim:
1. A method of removing a flexible article from a carrier plate having an article-contacting surface having a given surface shape, said article having a center and being in intimate contact with said article-contacting surface, comprising the steps of:
providing a removal plate having a boundary surface having a central zone, said boundary surface having a surface shape relative to said given surface shape such that, when the central zone is contacted against said article, said boundary surface curves relatively away from said article in each of two opposite directions from said central zone towards opposite ends of said article,
holding said removal plate against said article with said central zone contacting said article,
creating a partial vacuum between said boundary surface and said article, thereby causing said article to be displaced from said article-contacting surface towards said boundary surface, displacement of parts of the article situated between said ends progressing sequentially from said ends towards the center of the article and decreasing gradually from said ends towards the center of the article, and
moving said removal plate and said carrier plate relatively away from each other in a direction generally perpendicular to said central zone.
2. A method as claimed in claim 1, characterized in that at least one of said surfaces is a generally planar surface and the other of said surfaces is a cylindrical surface having an axis parallel to said planar surface.
3. A method as claimed in claim 1, characterized in that said removal plate includes a sealing ring arranged at a periphery of the plate, having a lip extending outwardly and towards said article.
4. A method of removing a flexible article from a carrier plate having an article-contacting surface, said article being in intimate contact with said article-contacting surface, and said article having a center and a generally planar surface at a side remote from said article-contacting surface, comprising the steps of:
providing a removal plate having a convex cylindrical boundary surface having a central zone,
holding said removal plate against said article with said central zone contacting said center of said article, whereby said boundary surface curves relatively away from said article in each of two opposite directions from said central zone towards opposite ends of said article,
creating a partial vacuum between said boundary surface and said article, thereby causing said article to be displaced from said article-contacting surface towards said boundary surface, displacement of parts of the article situated between said ends progressing sequentially from said ends towards the center of the article and decreasing gradually from said ends towards the center of the article, and
moving said removal plate and said carrier plate relatively away from each other in a direction generally perpendicular to said central zone.
5. A method as claimed in claim 4, characterized in that said boundary surface has a part of said central zone projecting beyond adjacent parts of the boundary surface.
6. A method as claimed in claim 4, characterized in that said removal plate includes a sealing ring arranged at a periphery of the plate, having a lip extending outwardly and towards said article.
7. A method as claimed in claim 4, characterized in that said flexible article is an information-carrying disc element.
8. A method as claimed in claim 4, characterized in that said carrier plate is a mold.
9. A device for removing a flexible article from a carrier plate, said article having a center and a generally planar surface remote from said carrier plate, comprising means for holding said carrier plate, and means including a vacuum source for moving said article out of contact with said plate, characterized in that said means for moving comprises:
a removal plate having a convex cylindrical boundary surface having a central zone,
means for holding said removal plate against said article with said central zone contacting said center of said article surface, whereby said boundary surface curves relatively away from said article in each of two opposite directions from said central zone towards opposite ends of said article,
means including said vacuum source for creating a partial vacuum between said boundary surface and said article, thereby causing said article to be displaced from said carrier plate towards said boundary surface sequentially from said ends towards the center of the article and, with displacement of parts of the article situated between said ends decreasing gradually from said ends towards the center of the article, and
means for moving said removal plate and said carrier plate relatively away from each other in a direction generally perpendicular to said central zone.
10. A device as claimed in claim 9, characterized in that said boundary surface has a part of said central zone projecting beyond adjacent parts of the boundary surface.
11. A device as claimed in claim 9, characterized in that said boundary face has an outer periphery with a diameter of approximately 20 to 35 mm, and the greatest height difference by which the boundary face curves away from said article while the removal plate is in contact with the article center is approximately 0.5 mm.
12. A device as claimed in claim 11, characterized in that said part of said central zone is a flat level part having a diameter of approximately 10 mm.
13. A device as claimed in claim 12, characterized in that said flat level part projects approximately 50 microns beyond adjacent parts of the boundary face.
14. A device as claimed in claim 13, characterized in that said carrier plate is a mold and said flexible article is an information-carrying disc-type element.
15. A device as claimed in claim 14, characterized in that said removal plate includes a sealing ring arranged at a periphery of the plate, having a lip extending outwardly and towards said article.
16. A device as claimed in claim 15, characterized in that said removal plate has an axis aligned with said center of said article, and
the device further comprises means for mounting said removal plate for free rotation about its axis.
17. A device as claimed in claim 9, characterized in that said removal plate includes a sealing ring arranged at a periphery of the plate, having a lip extending outwardly and towards said article.
US07/626,584 1989-12-07 1990-12-07 Method and device for removing a flexible product from a carrier plate Expired - Fee Related US5133824A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL8903010A NL8903010A (en) 1989-12-07 1989-12-07 METHOD AND APPARATUS FOR REMOVING A FLEXIBLE PRODUCT FROM A BEARING
NL8903010 1989-12-07

Publications (1)

Publication Number Publication Date
US5133824A true US5133824A (en) 1992-07-28

Family

ID=19855755

Family Applications (1)

Application Number Title Priority Date Filing Date
US07/626,584 Expired - Fee Related US5133824A (en) 1989-12-07 1990-12-07 Method and device for removing a flexible product from a carrier plate

Country Status (5)

Country Link
US (1) US5133824A (en)
EP (1) EP0432832A1 (en)
JP (1) JPH03197113A (en)
KR (1) KR910013251A (en)
NL (1) NL8903010A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5447596A (en) * 1993-03-10 1995-09-05 Mitsubishi Denki Kabushiki Kaisha Apparatus for producing semiconductor wafers
US5551625A (en) * 1992-07-20 1996-09-03 U.S. Philips Corporation Method of manufacturing a molding member and molding member which can be manufactured by means of the method
US5743685A (en) * 1994-06-02 1998-04-28 Quickmill, Inc. Clamping device for a workpiece processing machine
US6099215A (en) * 1994-06-02 2000-08-08 Quickmill Inc. Clamping device
US20040166653A1 (en) * 2002-12-16 2004-08-26 Sebastien Kerdiles Tools and methods for disuniting semiconductor wafers
US20050221587A1 (en) * 2001-10-19 2005-10-06 Fujitsu Limited Method of manufacturing a semiconductor device and a method for fixing the semiconductor device using substrate jig
US20060266477A1 (en) * 2005-05-24 2006-11-30 General Electric Company Method and apparatus for reducing surface defects
US9162435B2 (en) * 2013-10-11 2015-10-20 Tokyo Electron Limited Peel-off apparatus, peel-off system, peel-off method and computer storage medium
US9643396B2 (en) 2014-06-03 2017-05-09 Tokyo Electron Limited Peeling device, peeling system and peeling method

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4123199C2 (en) * 1991-07-12 1994-09-01 Georg Witt Method and device for mechanically removing foreign substances from the base material of a plate-shaped information carrier
DE9309935U1 (en) * 1993-07-03 1993-09-02 Leybold Ag Device for holding and transporting substrates
FR2848723B1 (en) * 2002-12-16 2005-02-25 Soitec Silicon On Insulator TOOL FOR DESOLIDARIZING PLATES IN THE FIELD OF SEMICONDUCTOR SUBSTRATES, TOGETHER OF SUCH TOOLS AND ASSOCIATED METHODS

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2730370A (en) * 1954-08-13 1956-01-10 George F Brewster Work holding chuck
JPS5678124A (en) * 1980-12-04 1981-06-26 Toshiba Corp Wafer chuck
US4301099A (en) * 1979-08-10 1981-11-17 U.S. Philips Corporation Method and device for manufacturing a plastics record carrier
US4381964A (en) * 1981-05-29 1983-05-03 Rca Corporation Method and apparatus for separating a stamper from a mold
US4449916A (en) * 1980-11-20 1984-05-22 Matsushita Electric Industrial Co., Ltd. Device for manufacturing information recording mediums
JPS60122140A (en) * 1983-12-06 1985-06-29 Pioneer Electronic Corp Manufacturing device of information recording disk
JPS60127544A (en) * 1983-12-13 1985-07-08 Matsushita Electric Ind Co Ltd Production for optical information carrier disc
US4603867A (en) * 1984-04-02 1986-08-05 Motorola, Inc. Spinner chuck
JPS61209139A (en) * 1985-03-14 1986-09-17 Victor Co Of Japan Ltd Manufacture of data recording medium base

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2730370A (en) * 1954-08-13 1956-01-10 George F Brewster Work holding chuck
US4301099A (en) * 1979-08-10 1981-11-17 U.S. Philips Corporation Method and device for manufacturing a plastics record carrier
US4449916A (en) * 1980-11-20 1984-05-22 Matsushita Electric Industrial Co., Ltd. Device for manufacturing information recording mediums
JPS5678124A (en) * 1980-12-04 1981-06-26 Toshiba Corp Wafer chuck
US4381964A (en) * 1981-05-29 1983-05-03 Rca Corporation Method and apparatus for separating a stamper from a mold
JPS60122140A (en) * 1983-12-06 1985-06-29 Pioneer Electronic Corp Manufacturing device of information recording disk
JPS60127544A (en) * 1983-12-13 1985-07-08 Matsushita Electric Ind Co Ltd Production for optical information carrier disc
US4603867A (en) * 1984-04-02 1986-08-05 Motorola, Inc. Spinner chuck
JPS61209139A (en) * 1985-03-14 1986-09-17 Victor Co Of Japan Ltd Manufacture of data recording medium base

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5551625A (en) * 1992-07-20 1996-09-03 U.S. Philips Corporation Method of manufacturing a molding member and molding member which can be manufactured by means of the method
US5447596A (en) * 1993-03-10 1995-09-05 Mitsubishi Denki Kabushiki Kaisha Apparatus for producing semiconductor wafers
US5743685A (en) * 1994-06-02 1998-04-28 Quickmill, Inc. Clamping device for a workpiece processing machine
US6099215A (en) * 1994-06-02 2000-08-08 Quickmill Inc. Clamping device
US7571538B2 (en) * 2001-10-19 2009-08-11 Fujitsu Microelectronics Limited Vacuum fixing jig for semiconductor device
US20050221587A1 (en) * 2001-10-19 2005-10-06 Fujitsu Limited Method of manufacturing a semiconductor device and a method for fixing the semiconductor device using substrate jig
US20040166653A1 (en) * 2002-12-16 2004-08-26 Sebastien Kerdiles Tools and methods for disuniting semiconductor wafers
US7187162B2 (en) 2002-12-16 2007-03-06 S.O.I.Tec Silicon On Insulator Technologies S.A. Tools and methods for disuniting semiconductor wafers
US20070093039A1 (en) * 2002-12-16 2007-04-26 S.O.I.Tec Silicon On Insulator Technologies S.A. Tools and methods for disuniting semiconductor wafers
US7740735B2 (en) 2002-12-16 2010-06-22 S.O.I.Tec Silicon On Insulator Technologies Tools and methods for disuniting semiconductor wafers
US20060266477A1 (en) * 2005-05-24 2006-11-30 General Electric Company Method and apparatus for reducing surface defects
US7351304B2 (en) * 2005-05-24 2008-04-01 General Electric Company Method and apparatus for reducing surface defects
US9162435B2 (en) * 2013-10-11 2015-10-20 Tokyo Electron Limited Peel-off apparatus, peel-off system, peel-off method and computer storage medium
US9643396B2 (en) 2014-06-03 2017-05-09 Tokyo Electron Limited Peeling device, peeling system and peeling method

Also Published As

Publication number Publication date
NL8903010A (en) 1991-07-01
JPH03197113A (en) 1991-08-28
KR910013251A (en) 1991-08-08
EP0432832A1 (en) 1991-06-19

Similar Documents

Publication Publication Date Title
US5133824A (en) Method and device for removing a flexible product from a carrier plate
US4831784A (en) Polishing apparatus for end faces of optical fibers
JP3937368B2 (en) Semiconductor wafer polishing apparatus having a flexible carrier plate
US3943666A (en) Method and apparatus for burnishing flexible recording material
JPH09104979A (en) Apparatus for clamping and keeping flat substrate
US5447596A (en) Apparatus for producing semiconductor wafers
US7118456B2 (en) Polishing head, retaining ring for use therewith and method fo polishing a substrate
KR20070011250A (en) Retaining ring with shaped surface
JPH06503508A (en) Board support device
EP0773372A3 (en) Rotation holding table for rotating and holding a storage disc thereon and a boss thereof
EP0107421B1 (en) Stretched surface recording disk and method of manufacture
JPS649145B2 (en)
US4670072A (en) Method of making a stretched surface recording disk
KR100671071B1 (en) Method and device for bonding two plate-shaped objects
EP0803339B1 (en) Optical disc moulding device and moulding method for optical disc
JP2506467B2 (en) Adhesive device for optical disk components
WO2003030161A1 (en) Method and device for manufacturing optical recording medium
JP2517025B2 (en) Semiconductor wafer mounter
US8182258B2 (en) Imprinting device
JPH071232Y2 (en) Ring material holding device in punching machine
JPH07302774A (en) Polishing of semiconductor substrate, device thereof and semiconductor substrate polishing use applying plate
CN1300791C (en) Optical disk and method for forming disk substrate for optical disk
JPH0755691Y2 (en) Disk molding stamper polishing equipment
KR200167342Y1 (en) Device for fixing glass disk of optical disk manufacture
JP3640542B2 (en) Stamper peeling device for optical disc

Legal Events

Date Code Title Description
AS Assignment

Owner name: PHILIPS AND DU PONT OPTICAL COMPANY, BUIZERDLAAN 2

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNORS:HUBERTS, PETRUS A.A.;WOUTERS, HENRICUS H.B.;REEL/FRAME:005537/0536

Effective date: 19900919

REMI Maintenance fee reminder mailed
LAPS Lapse for failure to pay maintenance fees
FP Lapsed due to failure to pay maintenance fee

Effective date: 19960731

STCH Information on status: patent discontinuation

Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362